<span ng-if="property.value && property.value.assigneeDesc != '' " 
	data-toggle="tooltip"
    data-placement="left" title="{{property.value.assigneeDesc}}">{{property.value.assigneeDesc|limitTo:20}}</span>
<span ng-if="!property.noValue && property.value && property.value.assigneeDesc == '' ">未定义抄送人</span>
<span ng-if="property.noValue">未定义抄送人</span>
